4.
样品加标回收率检测
Recoveries of Ponceau 4R spiked in samples
| Analyte | Concentration (μg/mL) |
Recoveries (%) |
RSD (%) | |
| Inter-day repeatability (n=6) | Intra-day repeatability (n=3) | |||
| 0.1 | 105.56 | 2.5 | 3.2 | |
| Ponceau 4R | 1.0 | 87.86 | 3.3 | 3.4 |
| 10.0 | 82.60 | 2.7 | 2.4 | |
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